Recover the Grinch's apology note from the Icey Fishery zone. You can get this item by completing the puzzle in the Icey Fishery zone. This is one of the artifacts you need for the Picking up the Pieces quest.

Christmas - RoCP
Previous Quest:
Picking up the Pieces

Stage 1: Find the Grinch's Apology Note

Stage 2: Return to the Elf at the Crash Site

Rewards: Red Stub x1, 315xp (!)

Questline: Christmas Event